Speaker enclosure



FIG. 1 is a front perspective view of a speaker enclosure showing my new design;

FIG. 2 is a side elevation thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevation thereof; and

FIG. 6 is a front elevation thereof. 

The ornamental design for a speaker enclosure, as shown and described. 